Various examples with respect to synchronization signal block (SSB) raster shift in mobile communications are described. A processor of a user equipment (UE) performs an initial cell search to identify a cell among one or more cells of a wireless communication system. The processor then camps on the identified cell. In performing the initial cell search, the processor scans through a plurality of SSB entries for frequency bands below 3 GHz with a SSB raster spacing and a SSB raster offset frequency that support sub-carrier spacing (SCS) spaced channel raster and 100 kHz channel raster for both 15 kHz SCS and 30 kHz SCS. A minimum channel bandwidth at 5 MHz or higher for 15 kHz SCS or at 10 MHz or higher for 30 kHz SCS is supported. The SSB raster spacing is a common multiple of 15 kHz and 100 kHz. The SSB raster offset frequency for 100 kHz channel raster is a multiple of 30 kHz plus/minus 10 kHz.
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2. The method of claim 1, wherein a SSB raster spacing is 1200 kHz, and wherein a SSB raster offset frequency is 100 kHz.
This invention relates to wireless communication systems, specifically to methods for configuring subcarrier spacing (SSB) raster parameters in a 5G New Radio (NR) network. The problem addressed is optimizing the synchronization signal block (SSB) raster spacing and offset frequency to improve cell search and initial access procedures in 5G networks. The invention defines a specific SSB raster spacing of 1200 kHz and a SSB raster offset frequency of 100 kHz. The SSB raster spacing determines the frequency separation between possible SSB positions, while the raster offset frequency adjusts the starting point of the raster grid. These parameters are critical for ensuring efficient and reliable synchronization between user equipment (UE) and the network. The method involves configuring the base station to transmit SSBs according to these predefined spacing and offset values, allowing UEs to accurately detect and decode synchronization signals. This configuration helps reduce search time and power consumption during initial access, enhancing overall network performance. The invention is particularly useful in scenarios requiring precise frequency alignment and rapid synchronization in 5G NR deployments.
3. The method of claim 1, wherein the scanning through the plurality of SSB entries comprises scanning through the plurality of SSB entries for frequency bands below 3 GHz for either or both of the SCS spaced channel raster and the 100 kHz channel raster.
This invention relates to wireless communication systems, specifically methods for scanning synchronization signal blocks (SSBs) in frequency bands below 3 GHz. The problem addressed is the need for efficient and accurate scanning of SSBs across different channel rasters, particularly in lower frequency bands where signal propagation characteristics differ from higher frequencies. The invention improves upon existing scanning techniques by optimizing the search process for both the spaced channel raster (SCS) and the 100 kHz channel raster in sub-3 GHz bands. The method involves scanning through multiple SSB entries to identify and synchronize with available network signals. The scanning process is tailored to the specific frequency range, ensuring compatibility with the physical layer characteristics of lower frequency bands. This approach enhances signal acquisition efficiency, reduces scanning time, and improves overall network access performance in sub-3 GHz deployments. The invention is particularly useful in scenarios where devices must quickly and reliably detect and connect to cellular networks operating in these frequency ranges.
4. The method of claim 1, wherein a SSB raster offset frequency for the 100 kHz channel raster is a multiple of 30 kHz plus or minus 10 kHz.
This invention relates to wireless communication systems, specifically to techniques for managing synchronization signal block (SSB) raster offsets in 5G New Radio (NR) networks. The problem addressed is ensuring efficient and flexible frequency planning for SSB transmissions in 100 kHz channel rasters, particularly when accommodating varying deployment scenarios and interference conditions. The method involves adjusting the SSB raster offset frequency for a 100 kHz channel raster. The offset frequency is set as a multiple of 30 kHz, with an additional adjustment of plus or minus 10 kHz. This allows for fine-tuning the SSB placement to optimize coverage, reduce interference, and support different network configurations. The approach ensures compatibility with existing 5G NR standards while providing flexibility in frequency allocation. The method may be used in conjunction with other techniques, such as determining a frequency range for SSB transmission or selecting a specific SSB raster offset based on network conditions. By allowing the offset to vary within a defined range, the invention enables better resource utilization and improved synchronization performance in 5G NR deployments. The solution is particularly useful in dense urban environments or scenarios where precise frequency planning is critical.
5. The method of claim 4, wherein the SSB raster offset frequency is 20 kHz, 40 kHz, 50 kHz, 70 kHz, 80 kHz or 100 kHz.
This invention relates to wireless communication systems, specifically methods for adjusting the synchronization signal block (SSB) raster offset frequency in cellular networks. The problem addressed is optimizing the placement of SSBs to improve synchronization and reduce interference in frequency-division multiplexed systems. The method involves selecting a specific SSB raster offset frequency from a predefined set of values to align synchronization signals with the network's frequency grid. The predefined values include 20 kHz, 40 kHz, 50 kHz, 70 kHz, 80 kHz, and 100 kHz, which correspond to common channel bandwidths and subcarrier spacings in modern wireless standards. By choosing an appropriate offset, the system ensures that SSBs are positioned optimally within the frequency domain, minimizing collisions and improving signal detection for user devices. This technique is particularly useful in dense network deployments where precise synchronization is critical for reliable communication. The method may be applied in base stations or network controllers to dynamically adjust the SSB raster based on network conditions or regulatory requirements. The selected offset frequency ensures compatibility with existing wireless protocols while enhancing performance in high-interference environments.
6. The method of claim 4, wherein a minimum of the SSB raster offset frequency is higher than two times of a highest frequency offset of by inaccuracy of a reference clock of the UE.
This invention relates to wireless communication systems, specifically addressing synchronization signal block (SSB) raster offset frequency adjustments in user equipment (UE) to mitigate reference clock inaccuracies. The problem solved is the potential misalignment of SSB detection due to frequency offsets caused by UE reference clock inaccuracies, which can degrade synchronization performance in cellular networks. The method involves adjusting the SSB raster offset frequency to ensure reliable synchronization. A key aspect is setting a minimum SSB raster offset frequency higher than twice the highest frequency offset caused by the UE's reference clock inaccuracy. This ensures that the SSB detection process remains robust despite clock inaccuracies, preventing synchronization errors. The adjustment is part of a broader synchronization process that includes receiving SSBs, estimating frequency offsets, and compensating for these offsets to maintain accurate timing and frequency alignment with the network. The method also involves determining the highest frequency offset caused by the UE's reference clock inaccuracy, which is used to calculate the minimum SSB raster offset frequency. This ensures that the SSB raster offset is sufficiently large to account for potential frequency deviations, improving synchronization reliability. The technique is particularly useful in scenarios where UE clock inaccuracies could otherwise lead to synchronization failures, such as in high-mobility environments or when using low-cost reference clocks.
7. The method of claim 4, wherein a maximum of the SSB raster offset frequency is lower than one third of a SSB raster spacing.
This invention relates to wireless communication systems, specifically to techniques for managing synchronization signal block (SSB) raster offset frequencies in cellular networks. The problem addressed is optimizing the placement of SSBs to improve synchronization and reduce interference in wireless transmissions. The invention describes a method where the maximum SSB raster offset frequency is constrained to be lower than one third of the SSB raster spacing. This ensures that the offset frequencies remain within a controlled range, preventing excessive overlap or misalignment between SSBs from different cells. The method involves determining the SSB raster spacing, which defines the frequency intervals at which SSBs are positioned, and then setting the maximum allowable offset frequency to a value that is less than one third of this spacing. This constraint helps maintain proper synchronization between base stations and user devices while minimizing interference. The technique is particularly useful in dense network deployments where multiple cells operate in close proximity, as it ensures that SSBs are spaced appropriately to avoid conflicts. The invention may also include additional steps such as adjusting the offset frequency dynamically based on network conditions or user device requirements. By limiting the maximum offset frequency, the method ensures reliable synchronization and efficient use of the frequency spectrum.
8. The method of claim 1, wherein the SCS spaced channel raster comprises a SCS spaced channel raster with 15 kHz SCS.
This invention relates to wireless communication systems, specifically to techniques for configuring and utilizing a subcarrier spacing (SCS) channel raster in a wireless network. The problem addressed is the need for efficient and flexible channel allocation in wireless communication systems, particularly in scenarios where different subcarrier spacings are used to support diverse services and requirements. The invention describes a method for implementing a spaced channel raster with a specific subcarrier spacing. The method involves defining a channel raster where the subcarriers are spaced at 15 kHz intervals. This raster configuration allows for precise frequency allocation and alignment of communication channels, ensuring compatibility with existing wireless standards and enabling efficient spectrum utilization. The method may also include steps for generating, transmitting, or receiving signals based on this 15 kHz SCS raster, ensuring proper synchronization and interference management in the wireless network. The invention may further involve adjusting or reconfiguring the channel raster dynamically to adapt to changing network conditions or service demands. The overall approach aims to improve spectral efficiency, reduce interference, and enhance the reliability of wireless communications.
9. The method of claim 8, wherein a minimum channel bandwidth is 5 MHz or higher.
A method for wireless communication involves transmitting and receiving data over a wireless channel with a minimum bandwidth of 5 MHz or higher. The method includes configuring a wireless device to operate within a specified frequency band, selecting a channel within that band, and establishing a communication link using the selected channel. The channel selection process ensures that the chosen channel meets the minimum bandwidth requirement of 5 MHz or higher, which is necessary for high-speed data transmission. The method may also involve adjusting transmission parameters, such as modulation schemes or coding rates, to optimize performance within the selected channel. The wireless device may be part of a network infrastructure, such as a base station or access point, or a user device, such as a smartphone or IoT sensor. The method is particularly useful in environments where high data rates are required, such as in 5G or Wi-Fi 6 networks, where wider bandwidths improve throughput and reduce latency. The technique ensures reliable communication by dynamically selecting channels that meet the bandwidth criteria, avoiding interference and maintaining signal integrity.
10. The method of claim 1, wherein the SCS spaced channel raster comprises a SCS spaced channel raster with 30 kHz SCS.
A method for wireless communication involves configuring a channel raster for a system using a 30 kHz subcarrier spacing (SCS). The channel raster defines the frequency positions where communication channels are located, ensuring proper alignment and synchronization between transmitting and receiving devices. The 30 kHz SCS is particularly useful in scenarios requiring higher spectral efficiency or broader bandwidth utilization, such as in advanced wireless networks like 5G or beyond. By using a 30 kHz SCS, the system can support wider channels, enabling faster data rates and improved performance in high-frequency bands. The method ensures that the channel raster is compatible with existing and future wireless standards, allowing seamless integration into evolving network architectures. This approach optimizes frequency resource allocation, reduces interference, and enhances overall system efficiency. The technique is applicable in various wireless communication systems, including cellular networks, IoT deployments, and other high-speed data transmission environments.
11. The method of claim 10, wherein a minimum channel bandwidth is 10 MHz or higher.
A method for wireless communication involves transmitting and receiving data over a wireless channel with a minimum bandwidth of 10 MHz or higher. The method includes configuring a wireless device to operate within a specified frequency band, where the channel bandwidth is set to at least 10 MHz to support high-data-rate transmissions. The wireless device may adjust its transmission parameters, such as modulation and coding schemes, to optimize performance within the allocated bandwidth. The method also includes error detection and correction mechanisms to ensure reliable data transfer. The wireless device may dynamically switch between different bandwidth configurations based on network conditions, user requirements, or regulatory constraints. The method is applicable in wireless communication systems, including but not limited to 5G, Wi-Fi, and other high-bandwidth wireless networks, where efficient use of spectrum is critical for achieving high-speed data transmission. The technique ensures compatibility with existing wireless standards while improving throughput and reducing latency in high-bandwidth applications.
12. The method of claim 1, wherein the SSB raster spacing is one of 300 kHz, 600 kHz, 900 kHz and 1200 kHz.
This invention relates to wireless communication systems, specifically to the configuration of synchronization signal blocks (SSBs) in cellular networks. The problem addressed is optimizing the spacing between SSBs to improve synchronization and coverage in 5G and other advanced wireless networks. SSBs are critical for initial cell access, as they carry essential synchronization and system information. The invention specifies a method for adjusting the raster spacing of SSBs to one of four predefined values: 300 kHz, 600 kHz, 900 kHz, or 1200 kHz. The raster spacing determines the frequency separation between possible SSB positions, influencing the network's ability to support different deployment scenarios, such as dense urban environments or wide-area coverage. By selecting an appropriate spacing, the system can balance synchronization accuracy, coverage efficiency, and resource utilization. The method ensures compatibility with existing standards while providing flexibility for network operators to optimize performance based on specific deployment needs. This approach enhances reliability and efficiency in wireless communication systems by dynamically adapting SSB configurations to varying operational conditions.
14. The apparatus of claim 13, wherein a SSB raster spacing is 1200 kHz, and wherein a SSB raster offset frequency is 100 kHz.
This invention relates to wireless communication systems, specifically to apparatuses for configuring synchronization signal blocks (SSBs) in a radio access network. The problem addressed is the need for precise frequency planning and alignment of SSBs to optimize network performance and reduce interference in cellular networks. The apparatus includes a transmitter configured to transmit SSBs with a defined raster spacing and offset frequency. The SSB raster spacing is set to 1200 kHz, which determines the frequency separation between adjacent SSBs. Additionally, the SSB raster offset frequency is 100 kHz, which defines the frequency shift from a reference point for SSB transmission. These parameters ensure proper synchronization and alignment of SSBs across the network, improving signal detection and reducing interference between neighboring cells. The apparatus may also include a processor to dynamically adjust the SSB raster spacing and offset frequency based on network conditions, such as traffic load or interference levels. This adaptability enhances network efficiency and reliability. The transmitter may operate in various frequency bands, including sub-6 GHz and millimeter-wave (mmWave) bands, supporting different wireless communication standards like 5G New Radio (NR). By defining specific SSB raster spacing and offset frequency values, the invention ensures consistent and efficient SSB transmission, facilitating seamless handover and improved user experience in wireless networks.
15. The apparatus of claim 13, wherein a SSB raster offset frequency for the 100 kHz channel raster is a multiple of 30 kHz plus or minus 10 kHz, and wherein a maximum of the SSB raster offset frequency is lower than one third of a SSB raster spacing.
This invention relates to wireless communication systems, specifically to techniques for managing synchronization signal block (SSB) raster offsets in 5G New Radio (NR) networks. The problem addressed is ensuring efficient and flexible frequency planning for SSB transmissions in 100 kHz channel rasters while avoiding interference and maintaining synchronization accuracy. The apparatus includes a transmitter configured to broadcast SSBs with a raster offset frequency that is a multiple of 30 kHz, adjusted by plus or minus 10 kHz. This offset ensures compatibility with the 100 kHz channel raster while allowing fine-tuning for network deployment. Additionally, the maximum offset frequency is constrained to be lower than one-third of the SSB raster spacing, preventing excessive frequency deviations that could disrupt synchronization. The system also includes a receiver that detects and processes these SSBs, using the defined offset to accurately determine the network's frequency reference. This approach optimizes frequency planning by balancing flexibility in deployment with strict synchronization requirements, ensuring reliable cell search and initial access in 5G NR networks. The solution is particularly useful for dense deployments where precise frequency alignment is critical to minimize interference and maximize spectral efficiency.
16. The apparatus of claim 13, wherein the SCS spaced channel raster comprises a SCS spaced channel raster with 15 kHz SCS, and wherein a minimum channel bandwidth is 5 MHz or higher.
A User Equipment (UE) includes a processor configured to perform an initial cell search to identify and connect to a cellular network. During this search, the processor scans Synchronization Signal Block (SSB) entries in frequency bands below 3 GHz. This scanning process specifically utilizes a Sub-Carrier Spacing (SCS) based channel raster, where the SCS is set to 15 kHz. For this 15 kHz SCS configuration, the system supports a minimum channel bandwidth of 5 MHz or higher. This enables the UE to efficiently detect and acquire signals from cells operating with these specific frequency and bandwidth parameters.
17. The apparatus of claim 13, wherein the SSB raster spacing is one of 300 kHz, 600 kHz, 900 kHz and 1200 kHz.
This invention relates to wireless communication systems, specifically to apparatuses for transmitting synchronization signal blocks (SSBs) in a cellular network. The problem addressed is optimizing the spacing between SSBs to improve synchronization and coverage in different deployment scenarios. The apparatus includes a transmitter configured to broadcast SSBs with adjustable raster spacing, allowing flexibility in network planning. The SSB raster spacing can be set to one of four predefined values: 300 kHz, 600 kHz, 900 kHz, or 1200 kHz. This adjustment enables the system to balance between coverage area and synchronization accuracy. For example, a smaller spacing like 300 kHz may be used for dense urban deployments requiring precise synchronization, while larger spacing like 1200 kHz may be used for wide-area coverage where broader signal reach is prioritized. The apparatus may also include a controller to dynamically select the raster spacing based on network conditions or user equipment (UE) requirements. This adaptability enhances system efficiency and reliability in varying environments. The invention is particularly useful in 5G and beyond networks where flexible synchronization mechanisms are critical for supporting diverse use cases.
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November 12, 2020
December 20, 2022
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